Must have knowledge of accounting revenue expenditure chargeable to the appropriate item to trade of goods must be inexpensive, too, or not to be "too, because items may not have quality.
Must have knowledge of the income statement charge reasonable prices calculated its trade must not be too expensive or too low, because the product may be adversely affected.
Must have knowledge of the accounting charge calculate price เหมาะสมแก่ the trade goods to the price not too expensive or cheap, too, because the product may not quality.